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Technical Information on Equipment Click here or on the logo above for the main Icom web site Compiled by Mike Morris WA6ILQ

www.repeater-builder is looking for information on the various models of current and older Icom commercial mobiles as to their usefulness as remote bases or point-to-point links. Also we are interested in the commercial mobiles, the amateur and commercial repeaters with emphasis on: What the differences are between the various models The frequency ranges and which ones are crystal or synthesized What makes one particular model better over another (i.e. which ones are the turkeys) What it takes to move them onto amateur radio frequencies If they aren't crystal controlled, information on how to program them (i.e. hardware programmer, PC program or front panel programming) would be appreciated, as well as what PC software do you need (and how to get it) If you have something to contribute, don't worry about your writing ability, your spelling, or anything else.   Just write something up, even if it's just an email, and send it to us.   We'll do the rest. Examples: an email that became an article web page an excel spreadsheet that became a reference web page a plain text file that became a how-to web page

Modifications and Articles

	Icom UX-49 PLL Lock Fix (The UHF IC-900 module)   By Kevin Custer W3KKC
	Icom CTCSS Tone Chart By Kevin Custer W3KKC
	Icom IC-2A/AT/E Frequency Range Mod
	A Modification for the Icom IC-02, 03, 04 transmit audio (will probably be appropriate for the H16, U16 as well)
	Icom IC-02, 03, 04, H16, U16 Tone Squelch encode/decode board information Donated by Jeff Kincaid W6JK
	Fixing the random microphonic crackle in the Icom IC-2100 2m mobile
	Interfacing an Icom IC-28, 38 or 48 mobile for remote base service   Donated by By Lee N3APP
	Interfacing the Icom IC-RPxx20 Repeater to a Link-Comm RLC Controller   58kb PDF file   This writeup is from Link Communications and is frequency independent.   Information donated by Eric Struble
	A repeater mod for the ICOM F121, F121S, F221, and F221S commercial radios   Donated by Sean Smith VE6SAR
	General Icom Commercial Equipment Information   Donated by Thomas Reynolds KD7SGM
	Solving antenna connector problems on Icom handhelds: IC2/3/4AT, IC02/03/04AT series   Donated by Mike Morris WA6ILQ
	Increasing the CTCSS level on the IC-706MKIIG transceiver   By David Branson KCØLL

Manuals and other Literature

Most of the manuals below showed up in my post office box on a CD-R in a recycled AOL mailer, with no return address, and a cryptic three-word note: "For Repeater‑Builder".

	Icom Manuals Download Page   From Icom's own web site   (offsite link)
	Anybody have the service manual for the IC2AT or IC4AT (or both) ?
	Icom IC-2AE (European) instruction manual less cover   717 KB PDF file
	Icom IC-2A/AT/E instruction manual   3.24MB PDF file
	Icom IC-2AT/E complete schematic   134 KB PDF file   (european model, with touchtone pad and tone burst)
	Icom IC-4A/AT/E instruction manual   3.24MB PDF file
	Icom IC-02A / AT instruction manual   4 MB PDF file
	Icom IC-02A / AT / E service manual   10.6 MB PDF file
	Icom IC-04A / AT / E instruction manual   4 MB PDF file
	Icom IC-04A / AT / E service manual   12.9 MB PDF file
	Icom IC-4GA / GAT / GE service manual   14.6 MB PDF file
	Icom IC-12GAT / IC12GE handheld service manual   15.2 MB PDF file
	Icom IC‑22U / IC‑24E/G mobile instruction manual   3.5 MB PDF file
	Icom IC-24AT / IC-24ET dual band handheld instruction manual   3.5 MB PDF file
	Icom IC-32A/AT/E dual band handheld service manual   17.4 MB PDF file
	Icom IC-47A/E UHF mobile service manual   17.2 MB PDF file
	Icom IC-208H mobile service manual   4.3 MB PDF file The service manual has a mis-print. On page 5-2 the resistor in the jig cable should be sized at 22 K ohm, not 2.2 K ohm. Even the Icom Knowledge Base Article on the topic has it wrong.
	Icom IC-3200A/E dual band mobile service manual   3.5 MB PDF file
	Icom IC-3220A/E/H dual band mobile service manual   3.5 MB PDF file
	Icom IC-H16 and IC-U16 owners manual 3.6 MB PDF file   The owners manual for the commercial version of the IC-02 and IC-04 (no programming info)
	Icom IC-U2, IC-H16 and IC-U16 Instruction manual   (2.56mb PDF file)   Seems to be a better scan of a different version of the above manual.
	Programming information document for several Icom models   (1.71mb PDF file)   Model list: the IC-H16, IC-U16, IC-U2, IC-V100, IC-U400, IC-V200, IC-U200 and the IC-V201.
	Icom IC-H16 VHF handheld service manual   13.4mb PDF
	Icom IC-U16 UHF handheld service manual   15.2mb PDF
	Icom IC-W2A / W2E handheld service manual   10.7mb PDF Icom IC-W2A / W2E handheld schematics only   514kb PDF To expand the receiver frequency range of the IC-W2A to 118.00-170.00, 322.00-513.00, and 800.000-970.000, do the following: Hold down the Light, B, and # keys while turning the power on. That's actually a four button sequence, since the power on function is controlled by a keypad button.
	Icom IC-W21AT / ET handheld service manual   10.7mb PDF
	Icom IC-W31AT / ET handheld service manual   13.2mb PDF
	Icom IC-W32AT / ET handheld instruction manual   718kb PDF
	Icom IC-W32AT / ET handheld service manual   19.2mb PDF
	Icom BC-35 desktop battery charger manual with schematic   882kB PDF file The BC35 is the drop-in rapid charger for the ICM‑5, IC‑M11, IC‑M16, IC‑U16, IC‑2GAT, IC‑02AT, IC‑2AT, IC‑32AT, IC‑4GAT, IC‑04GAT, IC‑04AT, IC‑4AT, IC‑12GAT, IC‑03AT, IC‑3AT, IC‑IC-H2, IC‑H6, IC‑H12, IC‑U12 plus the Radio Shack HTX202 and HTX404. This unit has an almost-fatal design flaw whe used with a BP-7 that has one or more shorted cells: R39, R40, R41 and R42 are four 1/4 watt 1 ohm resistors in series-parallel which comprise a 1 ohm 1 watt resistor. A while back WB6GSO came to me with a dead charger... Everything seemed to work except that the battery pack wouldn't charge. A bit of disassembly and some looking around revealed those 4 resistors were burned up and the board under them was badly charred. Being in the charging current path they get hot when a discharged battery is inserted. In the BC35 these four are soldered flush against the circuit board with next to no ventilation, and are marginal in wattage to start with. If the battery has a shorted cell the circuit pumps more than enough current to generate more heat than their free-space rating. If your (normally 12v) BP‑7 has two or three shorted cells in it the radio works as if it has a (normally 9.6v) BP‑8 on it, but the excess charging current toasts the resistors very quickly. Save your circuit board by replacing them with a single 1 ohm 2-watt (or larger) device. The 4 original devices are mounted at the edge of the circuit board and the replacement can stand off the board a half-inch or so on its own leads, and even hang over the edge in the airflow. And if the unit is in daily service, do it soon, like this weekend. I had a one ohm / five watt ceramic wirewound in the junk box and that worked fine for GSOs charger. And he replaced the defective inserts in his BP-7s with new ones. Being in the prime coverage area of the repeater he hadn't realized that his radio was in (effectively) the low power mode.
	Data sheet on the rechargeable battery packs for the IC‑2, IC‑3, IC‑4, IC‑02, IC‑03 and IC‑04 series handhelds 226kb PDF file     This includes the "amateur grade" BP‑2, BP‑3, BP‑4, BP‑5, BP‑5A, BP‑7, BP‑8 and BP‑70. Except for the BP‑4 they are recharged in the BC35 charger mentioned above (the BP‑4 is a holder for ten AA penlight cells).
	Data sheet on the rechargeable battery packs for the IC‑H16, IC‑U16 606kb PDF file     This includes the "commercial grade" CM‑5, CM‑7, CM‑8, CM‑12, CM‑96 series. The trailing B (as in CM‑7B) indicates black plastic, a trailing G (as in CM‑7G) indicated gray. No trailing letter (as in CM‑7) indicated dark gray. All except the CM‑12 series are recharged in the BC35 charger mentioned above (the CM‑12 is a holder for ten AA penlight cells).
	Icom IC-706 Service Manual   29MB PDF file   This is the HF radio that also does 6m. When coupled to a high-end repeater controller that understands what a HF remote base is (like a NHRC-10, or a Arcom RC210) this makes a dandy HF remote base... Just watch the pre-emphasis and de-emphasis! And note that the Icom command language in the 706 microprocessor has a firmware bug that Icom apparently will NOT fix no matter how many people report it (it's a 9+ year old design and they're too busy to fix it): The 706 series will not let you set the VHF/UHF CTCSS encoder frequency remotely.
	Icom IC-706 MK2 Service Manual   24.1 MB PDF file   This is the HF radio that also does 6m and 2m. More than one has ended up as a remote base attached to a UHF repeater controlled by an NHRC-10 controller.
	Icom IC-706 MK2G Service Manual   13.3 MB PDF file   This is the HF radio that also does 6m, 2m and 440MHz.
	Icom IC-900A/E mobile service manual   HUGE   62.2 MB PDF file
	Icom IC-901A/E mobile service manual   HUGE   69.2 MB PDF file
	Icom IC-2100H 2m mobile instruction manual   The complete manual as a 790 KB PDF file   Popular with the Packet / APRS community.   Also see the IC-2100 modification file above.
	Icom R1 Wideband Handheld Receiver Instruction Manual 7 MB PDF file
	Icom R-100 Communications Receiver Instruction Manual 2.17 MB PDF file
	Icom RP-1210 10w 1200MHz repeater service manual 6.5 MB PDF file
	Icom RP-1220 10w 1200MHz repeater instruction manual 1.6 MB PDF file
	Icom RP-1220 10w 1200MHz repeater service manual 21.2 MB PDF file
	Icom RP-1510 25w VHF repeater operations manual 3.9 MB PDF file   (older version) - Includes DIP switch frequency setting chart
	Icom RP-1520 25w VHF repeater instruction manual 4.7 MB PDF file
	Icom RP-1520 25w VHF repeater service manual 15.8 MB PDF file
	Icom RP-1620 50w VHF repeater instruction manual 2.14 MB PDF file   (newer version)
	Icom RP-2210 25w 220MHz repeater Operating and Service manual 12.8 MB PDF file
	Icom RP-2210 25w 220MHz repeater Operating and Service manual 5.1 MB PDF file   A later version that's less than half the file size.
	Icom RP-2210 220mc. Repeater Frequency Switch Chart in XLS (Excel) format
	Icom RP-4020 UHF Repeater Service Manual 16.2 MB PDF file   10, 25 or 50 watts, depending on the model /  version.
	Icom RP-4520 UHF Repeater Service Manual 16.7 MB PDF file   10, 25 or 50 watts, 5khz or 2.5khz deviation depending on the model /  version.
	Icom IC-F111S, 121S (VHF) and IC-F211S, 221S (UHF) instruction manual   From Sean Smith VE6SAR
	Icom IC-435 UHF mobile info package (sales flyer, schematic, programming)   2.1mb ZIP file